I think I deleted a function while I was cleaning up the code on the page that was still needed. I added it back:
<script>
function framework_load_plugin_url(plugin,form,div,framework_path,on_success_start,on_success_end) {
document.MM_returnValue = false;
framework_ajax_plugin(form,plugin,div,framework_path,false,on_success_start,on_success_end);
return true;
}
</script>
and the page works again now.